from fastapi import FastAPI
from fastapi.exceptions import RequestValidationError
from fastapi.middleware.cors import CORSMiddleware
from fastapi.middleware.gzip import GZipMiddleware
from starlette.exceptions import HTTPException as StarletteHTTPException

from app.api.router import api_router, health_router
from app.config import settings
from app.middleware.exceptions import (
    APIException,
    api_exception_handler,
    general_exception_handler,
    http_exception_handler,
    validation_exception_handler,
)
from app.middleware.logging import RequestLoggingMiddleware

app = FastAPI(
    title="小虾 SaaS API",
    description="自动化剪辑 SaaS 平台 API",
    version=settings.APP_VERSION,
    docs_url="/docs",
    redoc_url="/redoc",
)

app.add_exception_handler(APIException, api_exception_handler)
app.add_exception_handler(StarletteHTTPException, http_exception_handler)
app.add_exception_handler(RequestValidationError, validation_exception_handler)
app.add_exception_handler(Exception, general_exception_handler)

app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.CORS_ORIGINS,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)
app.add_middleware(GZipMiddleware, minimum_size=1000)
app.add_middleware(RequestLoggingMiddleware)

app.include_router(health_router)
app.include_router(api_router)


@app.get("/")
async def root():
    return {
        "service": settings.APP_NAME,
        "status": "running",
        "version": settings.APP_VERSION,
    }


if __name__ == "__main__":
    import uvicorn

    uvicorn.run(app, host="0.0.0.0", port=8000)